Dynamical decoupling of wells for an energy gap protected qubit

A system comprising:

• a qubit with two coherent states;
• filter modes coupled to the qubit;
• and
• a bath coupled to the filter modes,
• wherein:
• the filter modes and bath enable frequency selective photon dissipation from the qubit;
• and
• the coupling between the filter modes and the qubit suppress phase-flip errors.

A method for stabilizing a qubit comprising two coherent states, the method comprising:

• preparing the qubit comprising two coherent states in a ground state manifold;
• performing frequency selective photon dissipation from the qubit using filter modes coupled to the qubit;
• and
• suppressing phase-flip errors via the filter modes coupled to the qubit.

One or more non-transitory, computer-readable, storage media storing program instructions, that when executed cause:

• preparation of a qubit comprising two coherent states in a ground state manifold;
• and
• frequency selective photon dissipation from the qubit using filter modes coupled to the qubit,
• wherein phase-flip errors are suppressed via the filter modes coupled to the qubit.